Sikaflex 1A is a premium, one-component polyurethane sealant designed for professional-grade joint sealing in construction applications. Its non-sag consistency makes it ideal for vertical and overhead joints, delivering a durable, flexible seal that accommodates movement while maintaining strong adhesion.
Engineered for long-term performance, Sikaflex 1A bonds to a wide variety of substrates including concrete, masonry, aluminum, steel, and wood—making it a versatile choice for both new construction and repair projects.
Sikaflex-1a can be used in green and damp concrete applications. Meets Federal Specification TT-S-00230C, Type II, Class A. Meets ASTM C920, Type S, Grade NS, Class 35, Use T, NT, O, M,A, I. Canadian standard CAN/CGSB 19.13-M87.